^^Even though Yammy is the 0 espada (F*ck TK), I still wouldn't wanna be him for several reasons:

1.) His intelligence level is very low
2.) Unlike the other espada, he has to pretty much sit around for days to even build up enough reiatsu to transform into his 0 espada form. The other espada don't have to do that. They can transform at anytime and be powerful. So the hell with Yammy being the top espada. Stark>>>Yammy
3.) He's ugly. Not much to say with that one lol
4.) He's just raw power, I prefer to have a combination of Skill and Power